Also there is a companion programmer the PG-300, that generates MIDIsystem exclusive events. You put this in line between the sequencer/keyboardand the MIDI in on the MKS-50. Then you can tweak voice parameters in realtime. On the PG-300, the MIDI-OUT is the sysex it generates merged with datafrom MIDI IN on the PG-300; the MIDI-THRU just echoes MIDI-IN